Baker&#39;s oven.



C. E. GLAFKE. BAKERS OVEN.y

No. 708,975. Patented Sept. 9, |902.

\App1ication Sled Aug. 2, X901.)

(N0 Mdel.)

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CHARLES E. GLAFKE, OF LOS ANGELES, CALIFORNIA.

BAKERS OVEN.

SPECIFICATION forming part cf Letters Patent No. 708,975, dated September 9, 1902.

Application filed August 2, 1901. Serial No. 70.645. (No model.)

To IJZZ when?, il may concern:

Be it known that I, CHARLES E, GLAFKE, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles, State of California, have invented new and useful Improvements in Bakers Ovens, of which the following is a specification.

My invention relates, primarily, to that class of bakers ovens commonly called reelro ovens, in which the material to be baked is placed on swinging pans or shelves suspended from the arms of a reel within a baking-chainber supplied with the products of combustion from a furnace or iues in the lowerpart of the baking-chamber, the reel being rotated as required to bring the swinging shelves in turn to the mouth of the oven to be discharged and recharged bytheovensman; and the object thereof is to provide a furnace in zo which hydrocarbon fuel or gaseousfuel may be used to produce the required heat for baking.

In the accompanying drawings, which illustrate my invention as applied tothe form of reel-oven mechanism in common use, Figure l is a perspective view of my improved oven with a part of the trout broken away. Fig. 2 is a section taken on the line 2 2 of Fig. l with a part of the reel removed. Fig.

3o 3 is a section on the line 3 3 of Fig. 2.

4o removal of said material from the shelves.

In the bottom portion otl the baking-chamber is the main flue G, the front part of which forms a combustion-chamber which preferablyextends acrossthe baking-chamber. The rear portion is preferably ,contracted and is connected with the chimney, the opening therebetween being controlled by chimney-damper H, which is operated by rod l. Near the rear portion on each side of the 5o main flue and in communication therewith are connected thereto auxiliary lues J and K, which' terminate in open ends a short distance from the front wall of the oven. 'Ihe ends of these auxiliary ues that are nearer the front wall of the oven are provided with auxiliary-flue dam pers L and M, which are operated by rods N and O. Projecting into the front portion of the main flue is hydrocarbonburner P, connected to a suitable fuel and steam supply, (not shown,) below which is main-flue damper R, operated by rod S, by means of which the amount of air admitted into the iiue is controlled. This main Iiue could be located to one side of the center of the baking-chamber and used with only ono auxiliary Hue. I prefer the central position and the use of two auxiliary flues, as that arrangement distributes the heat better than with one auxiliary flue.

In the operation of my oven suitable fuel,

such as distillate or crude petroleum and steam or gaseous fuel, is supplied to the burner and the fire is lighted, the oven-door andthe auxiliary-Hue dampers are closed, and

Lthe main iue and the chimney-danipers are opened sufficiently to produce a good draft up the chimney. As soon as the main fine is sufficiently heated the chimney-damper is closed and the auxiliary-flue dampers and the oven-door are opened. This causes the products of combustion to enter the bakingchamber through the auxiliary flnes and to pass out at theoven-door, which soon raises the temperature ofthe baking-chamber to the baking-point, when the material to be baked is put upon the shelves of the reel, which is slowly rotated in the direction of the arrow. It will be observed that by joining the auxiliary tlues to the main flue near the back of the oven and by leading them away from the main flue and toward and terminating near the front of the oven the heat has to travel to the back of the oven in the main flue and then to near the front of the oven in the auX- iliary ilues, thereby evenly distributing the heat-radiatin g surfaces over the bottom of the oven, and the heat will be radiated from the top and sides of the main and auxiliary iiues, and that a portion of the heat passes out of the open ends of the auxiliary lines and passes up and out of the oven-door. It will also be observed that the material to be baked passes down through the escaping heated products of combustion and that the bottom thereof is IOO first presented thereto, causing the material to be first baked on the bottoni.v The distance which the products of combustion have to travel in the main and auxiliary lines causes their complete and perfect combustion in the fines, so that no smoke or objectionable gases escape into the baking-chamber, thereby rendering it possible to use the oven continuously instead of intermittently, as is the case with all ovens with which I am acquainted.

In all the reel-ovens with which I am acquainted coal, coke, wood, or other similar fuel is used in furnaces placed at the front of and under the floor of the baking-chamber. Sometimes these furnaces are so arranged that after the fire has been started and the fuel has reached the incandescent state by means of openings and auxiliary lines the furnace-chamber is put in communication with the baking-chamber, and the products of combustion pass directly into the bakingchamber; but such ovens are not adapted for the use of liquid hydrocarbon fuel, and the ordinary fuel'must be used. As soon as the incandescent fuel in the furnace is consumed or has parted with most of its heat the direct communication with the baking chamber must be closed and new fuel put into the furnace and the usual draft opened until the new fuel reaches the incandescent state, when direct communication with the baking-chamber may be again established. This operation renders the efficient baking effect of the oven intermittent.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In a reel-oven, a flue in the lower portion of the baking -chamber, extending therethrough to and communicating with the chimney; a damper in the opening between the iiue and chimney; a branch fine in communication with the main iiue near the chim-4 ney, and extending away from and terminating near the front Wall of the oven, in an open end; a damper in the open end of the branch Iiue and a door in the front wall of the oven above the said flues, whereby the products of combustion pass through the main iiue, then into the auxiliary flue and out thereof up through the oven and out of the door thereof.

2. In combination with a reel-oven, a iiue in the bottom of the oven extending therethrough transversely to the axis of the rcel and communicating with the chimney; a dam per in the opening between the fine and chimney; a branch line communicatingr with the main flue near the chimney, on each side thereof, extending away therefrom, and toward, and terminating in an open end near the front wall of the oven; a damper in the open ends of the branch fines, and a hydrocarbon-burner in the front end of the main flue and a door in the front wall of the oven above the said fines, whereby the products of combustion pass through the main flue, then into the auxiliary fine and out thereof up through the oven and out of the door thereof.

3. In a reel-oven, a main flue in the bottom of the baking chamber, extending therethrough, in communication with the chimney and having the front portion adapted for a combustion-chamber; a damper adapted to control the communication between the flue and chimney; branch i'lues in communication with the main flue, near the chimney and extending away from, and toward, and terminating in open ends near the front wall of the oven; dampers in, and adapted to control the open ends of the branch flues and a door in the front wall of the oven above the said iiues, whereby the products of combustion pass through the main iiue, then into the auxiliary iiue and out thereof up through the oven and out vof the door thereof.

4. In a reel-oven, a main iiue in communication with the chimney, having its front end adapted for a combustion-chamber; a branch flue in communication with the main iiue near the chimney, extending away from said fine, and terminating in an open end near the front of the oven; a damper in the main flue, controlling the opening therefrom into the chimney; a damper in the branch fine controlling its open end, and a door in the front wall of the oven above the said iiues, whereby the products of combustion pass through the main due, then into the auxiliary iiue and out thereof up through the oven and out of the door thereof in combination with a hydrocarbon-burner in the combustion-chamber of the main iiue.

In witness that Iclaim the foregoing I have hereunto subscribed my name this 26th day of July, 1901. f

CHARLES E. GLAFKE. Witnesses:

G. E. I-IARPHAM, MATTIE MCGINNIS.

IOO 

